A straight wire carries current in vertical upward direction. A point ‘ P ’ lies just east of it at a small distance and another point ‘ Q ’ lies to the west just same distance. The magnetic field at these points :– (consider earth magnetic field)

Question

A straight wire carries current in vertical upward direction. A point &lsquo; P &rsquo; lies just east of it at a small distance and another point &lsquo; Q &rsquo; lies to the west just same distance. The magnetic field at these points :&ndash; (consider earth magnetic field) (A) BP>BQ (B) BP < BQ (C) BP=BQ (D) None

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="Solution" src="https://cdn.tardigrade.in/q/nta/p-qd66muyutclbimvl.jpg" /> Here B= Magnetic field due to wire BE H= Horizontal component of earth's magnetic field ⇒ BP>BQ

Q. A straight wire carries current in vertical upward direction. A point ‘ $P$ ’ lies just east of it at a small distance and another point ‘ $Q$ ’ lies to the west just same distance. The magnetic field at these points :– (consider earth magnetic field)

$B_{P} > B_{Q}$

$B_{P} < B_{Q}$

$B_{P} = B_{Q}$

None

Here $B =$ Magnetic field due to wire
$B_{E H} =$ Horizontal component of earth's
magnetic field $\Rightarrow B_{P} > B_{Q}$

Q. A straight wire carries current in vertical upward direction. A point ‘ P ’ lies just east of it at a small distance and another point ‘ Q ’ lies to the west just same distance. The magnetic field at these points :– (consider earth magnetic field)

BP​>BQ​

BP​<BQ​

BP​=BQ​